﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NFlickr.Core.Interface;
using System.Security.Cryptography;

namespace NFlickr.EncrptProvider
{
    public class Md5 : IEncyptionProvider
    {
        // Hash an input string and return the hash as
        // a 32 character hexadecimal string.
        private string getMd5Hash(string input)
        {
            // Create a new instance of the MD5CryptoServiceProvider object.
            MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();

            // Convert the input string to a byte array and compute the hash.
            byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(input));

            // Create a new Stringbuilder to collect the bytes
            // and create a string.
            StringBuilder sBuilder = new StringBuilder();

            // Loop through each byte of the hashed data 
            // and format each one as a hexadecimal string.
            for (int i = 0; i < data.Length; i++)
            {
                sBuilder.Append(data[i].ToString("x2"));
            }

            // Return the hexadecimal string.
            return sBuilder.ToString();
        }



        #region IEncyptionProvider Members

        public string GetEncrypted(string source)
        {
            if (string.IsNullOrEmpty(source))
            {
                return string.Empty;
            }
            return getMd5Hash(source);
        }

        #endregion
    }

}
